A hair dryer that converts light energy into heat energy

Abstract

This utility model discloses a hair dryer that converts light energy into heat energy. The hair dryer includes: a heating element assembly, an air duct, and an infrared lamp inside the main unit. The heating element assembly is located inside the air duct, and the infrared lamp is positioned in the central area of ​​the heating element assembly. The infrared electromagnetic waves generated by the infrared lamp radiate to the heating element assembly and the inner wall of the air duct. By placing the infrared lamp in the central area of ​​the heating element assembly, this utility model allows the infrared electromagnetic waves to evenly cover the heating element assembly and the inner wall of the air duct in all directions. After absorbing the infrared electromagnetic waves, the molecules of the heating element assembly and the air duct generate heat through molecular motion, forming a "radiation-heat absorption-heat generation" conversion mechanism. This allows the airflow to fully contact the heating element assembly and the inner wall of the air duct as it passes through, quickly absorbing the accumulated heat. Finally, the airflow carries sufficient heat and blows out from the outlet, improving the drying efficiency of the hair dryer.

Description

Technical Field

[0001] This utility model relates to the field of hair dryer technology, and in particular to a hair dryer that converts light energy into heat energy. Background Technology

[0002] In the field of personal care appliances, hair dryers, as commonly used hair styling tools, have performance experiences closely related to users' daily needs. As consumers demand higher efficiency and comfort in hair styling, traditional hair dryers relying on resistance wire heating are gradually failing to meet market demands due to slow heating speed, high energy consumption, and uneven temperature distribution. Hair dryers based on infrared heating technology have emerged as a result.

[0003] Infrared heating hair dryers utilize infrared lamps to generate infrared electromagnetic radiation for heating. Compared to traditional resistance wire heating methods, they offer potential advantages such as faster heating speed, concentrated energy, and theoretically lower energy consumption, thus attracting widespread attention and R&D investment within the industry. However, existing infrared heating hair dryers on the market still suffer from a critical deficiency in practical applications: insufficient heat output. This results in lower-than-expected drying efficiency, hindering the full realization of the advantages of infrared heating technology.

[0004] Analysis revealed that the primary cause of the insufficient heat output was the inefficient utilization and conversion of the infrared electromagnetic radiation generated by the infrared lamps within the device. Specifically, on one hand, the existing product's internal structure lacks effective guidance for the infrared radiation path, resulting in some infrared rays being absorbed or lost directly by the casing without interacting with the airflow, thus wasting radiant heat. On the other hand, the heat exchange structure between the infrared lamps and the airflow is flawed, leading to low efficiency in converting infrared radiation energy into airflow. This results in insufficient heat transfer to the blown-out airflow, ultimately causing inadequate hot air temperature and heat intensity at the hairdryer's outlet, impacting the user experience and hair styling efficiency.

[0005] Therefore, optimizing the internal structure design of infrared heating hair dryers, improving the utilization rate and heat conversion efficiency of infrared electromagnetic wave radiation heat, and thus solving the problem of insufficient heat in existing products has become an urgent technical problem to be solved in the current research and development of infrared heating hair dryers. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a hair dryer that converts light energy into heat energy.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] This utility model provides a hair dryer that converts light energy into heat energy, including: a main unit, the main unit having a heating frame assembly, an air duct body and an infrared lamp tube inside, the front end of the heating frame assembly being located inside the air duct body, the infrared lamp tube being disposed in the central area of ​​the heating frame assembly, and the infrared electromagnetic waves generated by the infrared lamp tube radiating the heating frame assembly and the inner wall of the air duct body.

[0009] In one specific embodiment, the host also has a PCB board inside, and the infrared lamp tube and the heating frame assembly are connected in series and electrically connected to the PCB board.

[0010] In one specific embodiment, a power component is further provided at the rear end of the heating frame assembly. The airflow generated by the power component is heated by the heating frame assembly and then blown out along the gap between the heating frame assembly and the air duct cylinder.

[0011] In one specific embodiment, the power assembly consists of a motor and an impeller, with the motor fixed inside the main unit and the impeller drivenly connected to the motor.

[0012] In one specific embodiment, the heating frame assembly consists of a support frame and a heating element.

[0013] In one specific embodiment, the support frame is composed of several mica sheets connected together.

[0014] In one specific embodiment, the mica sheet is provided with a slot, and the infrared lamp is connected to the slot.

[0015] In one specific embodiment, the host computer is further provided with a control switch, which is electrically connected to the PCB board.

[0016] In one specific embodiment, the main unit is also provided with an air intake filter at the rear end of the power component.

[0017] In one specific embodiment, the main unit is also provided with a decorative cover at the front end of the air duct body.

[0018] The advantages of this new type of light-to-heat hair dryer compared to existing technologies are as follows: By placing the infrared lamp in the central area of ​​the heating element assembly, infrared electromagnetic waves can evenly cover the heating element assembly and the inner wall of the air duct from the radiation source. This arrangement allows the infrared radiation energy to directly act on the two key structures, the heating element assembly and the air duct, avoiding the waste of radiant heat due to path deviation. This ensures that the radiant energy generated by the infrared lamp is fully captured, improving energy utilization efficiency from the source. Furthermore, the molecules of the heating element assembly and the air duct absorb infrared radiation... After the magnetic wave passes through, the molecular motion intensifies the generation of heat, forming a highly efficient conversion mechanism of "radiation-heat absorption-heat generation". This process not only converts the radiation energy of infrared rays into the heat energy of the heating element, but also, through the structural design of the front end of the heating element being located inside the air duct, allows the airflow flowing through the air duct to fully contact the heating element and the inner wall of the air duct as it passes through, quickly absorbing the heat accumulated by both. Finally, the airflow carries sufficient heat and blows out from the air outlet, effectively solving the problem of insufficient hot air temperature and heat intensity, achieving a very good hot air effect, and improving the drying efficiency of the hair dryer and the user experience.

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A cross-sectional schematic diagram of the hair dryer that converts light energy into heat energy according to this utility model;

[0022] Figure 2 An exploded view of the hair dryer that converts light energy into heat energy according to this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0030] See Figures 1 to 2 The specific embodiment shown in this utility model discloses a hair dryer that converts light energy into heat energy, including: a main unit 10, wherein the main unit 10 is provided with a heating frame assembly 20, an air duct cylinder 30 and an infrared lamp tube 40 inside, the front end of the heating frame assembly 20 is located inside the air duct cylinder 30, the infrared lamp tube 40 is disposed in the central area of ​​the heating frame assembly 20, and the infrared electromagnetic waves generated by the infrared lamp tube 40 radiate the heating frame assembly 20 and the inner wall of the air duct cylinder 30.

[0031] Specifically, the main unit 10 includes a shell, an air inlet, an air outlet, and an internal mounting cavity. The shell is made of high-temperature resistant ABS material in one piece. The air inlet is located at the rear end of the main unit 10, and the air outlet is located at the front end. The internal mounting cavity uses a bracket structure to position and fix the heating frame assembly 20, the air duct cylinder 30, and the infrared lamp tube 40. The air duct 30 is a cylindrical metal cylinder (preferably made of aluminum alloy, which is both lightweight and thermally conductive) with both ends open. Its axis coincides with the center line connecting the air inlet and outlet of the main unit 10, ensuring smooth airflow along the axis of the air duct 30. The heating frame assembly 20 includes an annular mounting base and several radial heat-conducting plates. The outer diameter of the annular mounting base is adapted to the inner diameter of the air duct 30, so that the front end of the heating frame assembly 20 (near the air outlet) is fixed to the inner side of the air duct 30 by interference fit or snap-fit ​​structure. The heat-conducting plates are evenly distributed radially along the annular mounting base, and an airflow channel is formed between adjacent heat-conducting plates. The infrared lamp 40 is a straight carbon fiber infrared lamp 40, the length of which matches the axial dimension of the heating frame assembly 20. It is horizontally mounted through the insulating fixing base in the center of the annular mounting base, so that the axis of the infrared lamp 40 coincides with the central axis of the heating frame assembly 20, that is, the infrared lamp 40 is located in the central area of ​​the heating frame assembly 20.

[0032] When the infrared lamp 40 is powered on, the infrared electromagnetic waves generated on its surface spread outward in a 360-degree radial radiation manner. Since the infrared lamp 40 is located in the central area of ​​the heating frame assembly 20, the radiation range can completely cover the annular mounting base and all heat-conducting plates of the heating frame assembly 20, and at the same time radiate to the inner wall of the air duct cylinder 30. The heat-conducting plates of the heating frame assembly 20 and the inner wall of the air duct cylinder 30 are both made of metal materials with high infrared absorption coefficients (such as aluminum alloy with a blackened surface), which can quickly absorb infrared electromagnetic wave energy, causing their own molecules to move violently and be converted into heat energy, so that the temperature of the heating frame assembly 20 and the air duct cylinder 30 rises rapidly. At this time, the fan inside the main unit 10 draws in cold air from the air inlet. After the cold air enters the air duct cylinder 30, it flows along the airflow channel between the heat-conducting plates. During the flow, it comes into full contact with the high-temperature heat-conducting plates and the inner wall of the air duct cylinder 30, and absorbs heat through heat conduction and convection heat exchange, finally forming high-temperature hot air that is blown out from the air outlet.

[0033] In other words, by placing the infrared lamp 40 in the central area of ​​the heating frame assembly 20, infrared electromagnetic waves can evenly cover the inner walls of the heating frame assembly 20 and the air duct 30 from the radiation source. This arrangement allows infrared radiation energy to directly act on the two key structures, the heating frame assembly 20 and the air duct 30, avoiding the waste of radiant heat due to path deviation. This ensures that the radiant energy generated by the infrared lamp 40 is fully captured, improving energy utilization efficiency from the source. Furthermore, after absorbing infrared electromagnetic waves, the molecules of the heating frame assembly 20 and the air duct 30 will... The increased movement generates heat, forming a highly efficient conversion mechanism of "radiation-heat absorption-heat generation". This process not only converts the radiation energy of infrared rays into the heat energy of the heating frame component 20, but also, through the structural design of the front end of the heating frame component 20 located inside the air duct cylinder 30, allows the airflow flowing in the air duct to fully contact the heating frame component 20 and the inner wall of the air duct cylinder 30 as it passes through, quickly absorbing the heat accumulated by both. Finally, the airflow carries sufficient heat and blows it out from the air outlet, effectively solving the problem of insufficient hot air temperature and heat intensity, achieving a very good hot air effect, and improving the drying efficiency of the hair dryer and the user experience.

[0034] In one embodiment, the host 10 is further provided with a PCB board 50, and the infrared lamp tube 40 and the heating frame assembly 20 are connected in series and electrically connected to the PCB board 50.

[0035] Specifically, the PCB board 50 integrates a power interface, a temperature control chip, a switch module, and power supply lines. Its input terminal is connected to external AC power via a power cord, and its output terminal forms a series circuit with the heating frame assembly 20 and the infrared lamp 40. The specific circuit connection is as follows: the positive output terminal of the PCB board 50 is first electrically connected to the annular mounting base of the heating frame assembly 20 (the annular mounting base is made of conductive metal and serves as a circuit connection node). The other end of the heating frame assembly 20 is connected to one electrode of the infrared lamp 40 via a wire, and the other electrode of the infrared lamp 40 is connected back to the negative output terminal of the PCB board 50 via a wire, forming a series loop of "PCB board 50 - heating frame assembly 20 - infrared lamp 40 - PCB board 50". To ensure circuit safety and connection stability, the wires between the heating frame assembly 20 and the infrared lamp 40 are made of high-temperature resistant silicone wire. The wire joints are fixed to the component electrodes via crimp terminals and wrapped with insulating heat-resistant sleeves. Overload protection fuses are installed at the corresponding connection nodes on the PCB board 50, which automatically melt when the circuit current exceeds a preset threshold to prevent component damage. Meanwhile, the temperature control chip collects the temperature data of the heating frame assembly 20 in real time through the thermistor, and its signal output terminal is electrically connected to the switch module on the PCB board 50 to realize the on-off control of the circuit.

[0036] When the user starts the hair dryer, external AC power is input through the power interface of PCB board 50, and is converted into DC voltage by the rectifier and filter circuit before being output to the series circuit. Since the infrared lamp 40 requires low-voltage power (e.g., 12V DC), and the radial heat-conducting sheet of the heating element assembly 20 is made of a metal material with a specific resistance value (e.g., nickel-chromium alloy, the resistance value is set according to the required voltage drop), when current flows through the heating element assembly 20, its own resistance will generate a voltage drop. By preset the resistance parameters of the heating element assembly 20, the voltage drop across the heating element assembly 20 in the series circuit can reach most of the rectified AC voltage, and the remaining low-voltage voltage just meets the power supply requirements of the infrared lamp 40, achieving the design objective of "supplying low-voltage power to the infrared lamp 40 after voltage reduction through the resistance value of the heating element assembly 20 itself."

[0037] In other words, by utilizing the inherent resistance of the heating element assembly 20 to achieve voltage reduction, a separate voltage-reducing component is eliminated. On one hand, this reduces the number of electronic components on the PCB board 50, simplifies circuit design, and lowers the product's hardware cost. On the other hand, eliminating the installation space for a voltage-reducing component allows for a more compact internal structure of the main unit 10, contributing to the miniaturization of the hair dryer and improving product portability. Furthermore, the infrared lamp 40 is not only difficult to control under high voltage conditions but also poses a risk of breakdown. Providing it with low-voltage power through the heating element assembly 20 fundamentally avoids the safety hazards associated with high-voltage power supply. Simultaneously, the resistance of the heating element assembly 20 exhibits a stable linear change with temperature, resulting in a stable voltage output and preventing voltage fluctuations caused by a faulty voltage-reducing module. This ensures that the supply voltage of the infrared lamp 40 remains within a safe threshold, extending its lifespan and improving the overall operational stability of the device. Furthermore, since the infrared lamp 40 and the heating element assembly 20 are connected in series and their currents are kept consistent, the temperature control chip on the PCB board 50 can control the loop current to synchronously adjust the heat generation of the heating element assembly 20 and the radiation intensity of the infrared lamp 40. When the temperature of the heating element assembly 20 reaches a preset threshold, the temperature control chip reduces the loop current through the switching module, which can both prevent the heating element assembly 20 from overheating and simultaneously reduce the radiation of the infrared lamp 40, achieving coordinated regulation of "heat generation and radiation," avoiding energy waste, and improving the energy efficiency of the product.

[0038] In one embodiment, the rear end of the heating frame assembly 20 is further provided with a power assembly 60, and the airflow generated by the power assembly 60 is heated by the heating frame assembly 20 and then blown out along the gap between the heating frame assembly 20 and the air duct cylinder 30.

[0039] Specifically, the airflow generated by the power unit 60 can quickly pass through the heating frame assembly 20 and fully contact the inner walls of the heating frame assembly 20 and the air duct cylinder 30, rapidly absorbing the heat accumulated in both to achieve rapid heating. Compared with traditional heating methods, this design can significantly shorten the heating time and improve the efficiency of the hair dryer. For example, the airflow can be heated to a suitable temperature in a short time to meet the user's need for quick hair drying. Since the airflow is blown evenly along the gap between the heating frame assembly 20 and the air duct cylinder 30, the airflow distribution at the outlet is uniform, which allows the heated object (such as hair) to receive uniform hot air, avoiding local overheating or underheating, and improving the styling effect and user comfort of the hair dryer. In addition, placing the power unit 60 at the rear end of the heating frame assembly 20 makes full use of the internal space of the hair dryer, making the entire structure more compact. This design not only reduces the size of the hair dryer, making it easier to carry and store, but also reduces production costs.

[0040] In one embodiment, the power assembly 60 consists of a motor and an impeller, the motor being fixed inside the main unit 10, and the impeller being drivenly connected to the motor.

[0041] Specifically, the appropriate motor type should be selected based on factors such as the power requirements of the hair dryer, the usage scenario, and cost control. Common types include DC brushed motors, DC brushless motors, and AC motors. Additionally, suitable fasteners, such as screws and nuts, should be used to securely fix the motor in its mounting position. The appropriate impeller type should be selected based on the airflow and air pressure requirements of the hair dryer, as well as the motor's speed characteristics. Common impeller types include centrifugal impellers and axial impellers. The impeller is typically connected to the motor shaft via a key connection, a flat key connection, or a set screw connection.

[0042] In other words, the motor drives the impeller to rotate at high speed, which can generate a strong airflow. The generated airflow comes into full contact with the inner wall of the heating frame assembly 20 and the air duct cylinder 30, quickly absorbing the heat accumulated by both to achieve rapid heating, and then blows out along the gap between the heating frame assembly 20 and the air duct cylinder 30.

[0043] In one embodiment, the heating frame assembly 20 consists of a support frame and a heating element.

[0044] Specifically, the support frame adopts a frame design, and the heating element can be a heating wire or a nickel-chromium alloy sheet-like resistive element. The support frame structure provides stable support for the heating element, ensuring that it will not loosen, deform, or be damaged during operation due to vibration, impact, or its own weight. Even under prolonged use or frequent movement of the hair dryer, the heating frame assembly 20 maintains a stable structure, ensuring the normal operation of the hair dryer.

[0045] In one embodiment, the support frame is composed of several mica sheets connected together.

[0046] Specifically, the support frame is constructed using a multi-layered mica sheet stacking and connection method, with high-temperature resistant and highly insulating white mica sheets selected as the base material. The support frame has an overall structure of "ring-shaped frame + radial support arms". The outer diameter of the ring-shaped frame matches the inner diameter of the air duct body 30, and the inner diameter matches the root width of the radial support arms. There are 6-10 radial support arms, distributed at equal angles. One end of each arm is bonded to the corresponding position on the inner side of the ring-shaped frame using high-temperature resistant silicone adhesive, while the other end converges and is bonded to the central fixing plate, forming a radial frame. To enhance structural strength, the connection between the ring-shaped frame and the radial support arms is reinforced with stainless steel rivets to prevent bonding failure under long-term high temperatures. The central fixing plate has mounting holes adapted to the infrared lamp tube 40, with insulating ceramic sleeves pasted on the hole walls to prevent direct contact between the infrared lamp tube 40 and the support frame, which could lead to a short circuit. Furthermore, the radial support arms have pre-drilled slots for mounting the heating element; the edges of the slots are polished to create a smooth transition, preventing scratches on the surface of the heating element. Furthermore, the heating element (a thin-film nickel-chromium alloy resistive element) is fixed in the slot of the radial support arm using high-temperature resistant clamps. A thin insulating pad is placed between the clamp and the mica sheet to further enhance the insulation effect. The electrodes at both ends of the heating element are welded to the conductive metal ring (copper material) embedded on the outer side of the annular frame and the metal contacts of the central fixing plate, respectively, to form a circuit path. At the same time, the annular frame of the support frame is positioned inside the air duct 30 through a snap-fit ​​structure, and the mounting hole of the central fixing plate mates with the infrared lamp 40 to ensure that the infrared lamp 40 is located in the central area of ​​the heating frame assembly 20, achieving uniform infrared radiation to the heating element and the inner wall of the air duct 30.

[0047] In one embodiment, the mica sheet is provided with a slot, and the infrared lamp tube 40 is connected to the slot.

[0048] Specifically, the mica sheet forms the radial support arm of the support frame, and a slot is integrally machined at the end where it converges to the central fixed base plate. The slot adopts a "U-shaped opening + arc-shaped positioning groove" structure: the U-shaped opening faces the outside of the support arm, and the opening width is slightly smaller than the outer diameter of the infrared lamp tube 40, ensuring that the infrared lamp tube 40 can be snapped in by elastic deformation during installation; the inner diameter of the arc-shaped positioning groove is perfectly matched with the outer diameter of the infrared lamp tube 40, the groove depth is 1 / 2 of the diameter of the infrared lamp tube 40, and the groove wall is finely polished to avoid sharp edges scratching the glass shell of the infrared lamp tube 40.

[0049] In one embodiment, the host 10 is further provided with a control switch, which is electrically connected to the PCB board 50.

[0050] Specifically, the control switch is a multi-position tactile button switch, integrating airflow and temperature adjustment functions. It is installed in the middle of the side of the main unit 10 housing for easy one-handed operation. The switch body is assembled into the pre-drilled mounting holes in the housing using a double-fixed method of clips and screws. The switch panel is flush with the surface of the main unit 10 housing, and the edges are designed with a rounded transition to improve grip comfort. Four high-temperature resistant wires extend from the back of the control switch and are electrically connected to the corresponding interfaces on the PCB board 50 through plug-in terminals. The switch integrates a gear detection module, which triggers corresponding circuit signals through different buttons: the airflow adjustment has three levels, "low-medium-high", corresponding to different speeds of the motor in the power component 60; the temperature adjustment has four levels, "low-medium-high-cool", which adjust the power of the heating element 20 and the infrared lamp 40 by controlling the output signal of the temperature control chip on the PCB board 50. At the same time, LED indicator lights are set on the switch panel for the corresponding gear, and the indicator lights are connected to the light drive circuit of the PCB board 50 through wires to display the current working gear in real time.

[0051] In one embodiment, the host unit 10 is further provided with an air intake filter at the rear end of the power assembly 60.

[0052] Specifically, the air inlet filter adopts a double-layer composite structure. The outer layer is a nylon mesh used to intercept large particles such as hair and dust; the inner layer is a HEPA filter that can filter PM2.5, pollen, and some microorganisms. The filter is circular in shape, with its diameter perfectly matching the inner diameter of the air inlet at the rear of the main unit 10. An elastic silicone sealing ring is wrapped around the edge using an injection molding process. The outer diameter of the sealing ring is slightly larger than the inner diameter of the air inlet, forming an interference fit structure. An annular groove is located inside the air inlet at the rear of the main unit 10, allowing the air inlet filter to be installed via a "press-fit" method.

[0053] In one embodiment, the host 10 is also provided with a decorative cover 70 at the front end of the air duct body 30.

[0054] Specifically, the decorative cover 70 adopts a ring-shaped thin-walled structure, with an overall trumpet-like shape. Its outer diameter is consistent with the outer diameter of the front shell of the main unit 10, while its inner diameter is slightly smaller than the inner diameter of the air duct body 30, ensuring that it does not obstruct airflow output. The decorative cover 70 is injection molded from translucent ABS material, and its surface is treated with matte sandblasting, which provides both structural strength and a delicate visual texture. Its inner edge is provided with an L-shaped buckle, which is integrally formed with the decorative cover 70, and the end of the buckle has an anti-slip barb for connecting with the corresponding structure of the main unit 10 shell.

[0055] Specifically, the other structures of the host 10 adopt existing publicly available technologies, which will not be elaborated on here.

[0056] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A hair dryer that converts light energy into heat energy, characterized by, It includes: a main unit, which has a heating frame assembly, an air duct body and an infrared lamp tube inside. The front end of the heating frame assembly is located inside the air duct body, and the infrared lamp tube is located in the central area of ​​the heating frame assembly. The infrared electromagnetic waves generated by the infrared lamp tube radiate to the heating frame assembly and the inner wall of the air duct body.

2. The hair dryer converting light energy into heat energy according to claim 1, characterized in that, The host also has a PCB board inside, and the infrared lamp tube and the heating frame assembly are connected in series and electrically connected to the PCB board.

3. The hair dryer that converts light energy into heat energy according to claim 1, wherein, The rear end of the heating frame assembly is also provided with a power assembly. The airflow generated by the power assembly is heated by the heating frame assembly and then blown out along the gap between the heating frame assembly and the air duct cylinder.

4. The hair dryer for converting light energy into heat energy according to claim 3, characterized in that, The power unit consists of a motor and an impeller. The motor is fixed inside the main unit, and the impeller is driven and connected to the motor.

5. The hair dryer for converting light energy into heat energy according to claim 1, characterized in that, The heating frame assembly consists of a support frame and a heating element.

6. The light-to-heat energy converting hair dryer according to claim 5, characterized in that The support frame is composed of several mica sheets connected together.

7. The light-to-heat energy converting hair dryer according to claim 6, characterized in that The mica sheet has a slot, and the infrared lamp is connected to the slot.

8. The hair dryer for converting light energy into heat energy according to claim 2, characterized in that, The host computer is also equipped with a control switch, which is electrically connected to the PCB board.

9. The light-to-heat energy converting hair dryer according to claim 3, wherein, The main unit is located at the rear end of the power component and is also equipped with an air intake filter.

10. The light-to-heat energy converting hair dryer of claim 1, wherein, The main unit is located at the front end of the air duct body and is also equipped with a decorative cover.

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